File size increases every time I save
The Cache of ParticleSystem saves with the file (apparently).

Removing ParticleSystem from Sphere.001 reduces the file size. Reducing the Number of Emitted Particle from 500000 to 1 does the same.

Detailed Steps


Select Sphere.001 on Layer 2.
Go to the Particle System Tab. As you can see it has 20 users. Remove the particle system.
Select the other users and remove the particle system from each. Plane_cell.013
,Plane_cell.461
,Plane_cell.464
,Plane_cell.464
,Plane_cell.543
,Plane_cell.545
,Plane_cell.623
,Plane_cell.627
,Plane_cell.648
,Plane_cell.713
,Plane_cell.728
,Plane_cell.743
,Plane_cell.754
,Plane_cell.757
,Plane_cell.763
,Plane_cell.771
,Plane_cell.834
,Plane_cell.854
,Plane_cell.875.
They are easy to locate in the outliner, since they have the modifier icon next to their name.


While it is best practice to create a separate cache directory, you may have assigned the particle system to some objects by accident, thus increasing the performance cost (more particle emitting objects).